AirHint found the following cheapest return flights from Zurich (ZRH) to Sofia (SOF) in December 2025 (see full year).

Return flights

06 Dec - 07 Dec	Vueling Airlines
05 Dec - 07 Dec	Air Serbia
05 Dec - 08 Dec	Air Serbia
12 Dec - 15 Dec	Air Serbia
18 Dec - 02 Jan	easyJet
23 Dec - 25 Dec	easyJet
23 Dec - 26 Dec	easyJet
23 Dec - 30 Dec	easyJet
29 Dec - 03 Jan	easyJet
19 Dec - 03 Jan	easyJet
28 Dec - 03 Jan	SWISS
21 Dec - 28 Dec	easyJet
27 Dec - 03 Jan	Air Serbia
18 Dec - 04 Jan	SWISS
17 Dec - 04 Jan	Air Serbia
21 Dec - 04 Jan	Air Serbia
19 Dec - 04 Jan	Air Serbia
29 Dec - 04 Jan	SWISS
21 Dec - 28 Dec	SWISS	direct

Also check the deals for one-way flights from Zurich to Sofia in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Zurich to Sofia in December from 165€

Return flights